On Thu, Aug 25, 2022, Vasant Karasulli wrote: > There is at least one test that I know uses string IO i.e. x86/amd_sev.c. That one should be easy to convert to directly do #VMGEXIT when SEV-ES is enabled. Or maybe delete it an enlighten emulator.c's version? > I will check if there are more. Tests that explicitly validate string I/O aren't all that interesting, we really only need one string I/O test for SEV-ES. I supposed one could make the argument that it'd be useful to ensure that string I/O generates #VC as expected, but that can be done without actually decoding the I/O. Hmm, or cheat. E.g. write up a dedicated #VC handler in x86/amd_sev.c for the string I/O test to forward the #VMGEXIT, but rely on the existing checks in test_stringio() to ensure it was done correctly. That way there's no need to do fancy decoding, but the "spirit" of the test is kept intact.
